学术英语 医学 Unit 3(2)

Unit 3Prevention Diseases and Treatment ofDespite the progress in medicine, many diseases are still untreatable and incurable. It has been generally agreed that prevention is more costeffective than the treatment of diseases. Here come some fundamental questions: Which play a more important role in causing human diseases, genes or environmental factors? Why do people with good interpersonal relationships live healthier and longer? What are the major steps in developing a new drug? In this unit, we will probably find the answers to these questions.